Company-wide counters (status split, decline split, fraud/chargeback, distinct customers and merchants, USD sum, first/last seen) plus a per-day series for every requested linking entity. Not cluster-scoped: it aggregates every transaction of the company carrying the entity value inside the requested window. The whole entity batch is answered by one ClickHouse pass, so asking for the full left rail costs the same as asking for one entity. The window is required and its span is capped server-side